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Regulatory protein SrpA controls phage infection and core cellular processes in Pseudomonas aeruginosa.

ABSTRACT: Our understanding of the molecular mechanisms behind bacteria-phage interactions remains limited. Here we report that a small protein, SrpA, controls core cellular processes in response to phage infection and environmental signals in Pseudomonas aeruginosa. We show that SrpA is essential for efficient genome replication of phage K5, and controls transcription by binding to a palindromic sequence upstream of the phage RNA polymerase gene. We identify potential SrpA-binding sites in 66 promoter regions across the P. aeruginosa genome, and experimentally validate direct binding of SrpA to some of these sites. Using transcriptomics and further experiments, we show that SrpA, directly or indirectly, regulates many cellular processes including cell motility, chemotaxis, biofilm formation, pyocyanin synthesis and protein secretion, as well as virulence in a Caenorhabditis elegans model of infection. Further research on SrpA and similar proteins, which are widely present in many other bacteria, is warranted.

SUBMITTER: You J

PROVIDER: S-EPMC5945682 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Regulatory protein SrpA controls phage infection and core cellular processes in Pseudomonas aeruginosa.

You Jiajia J Sun Li L Yang Xiaojing X Pan Xuewei X Huang Zhiwei Z Zhang Xixi X Gong Mengxin M Fan Zheng Z Li Lingyan L Cui Xiaoli X Jing Zhaoyuan Z Jin Shouguang S Rao Zhiming Z Wu Weihui W Yang Hongjiang H

Nature communications 20180510 1

Our understanding of the molecular mechanisms behind bacteria-phage interactions remains limited. Here we report that a small protein, SrpA, controls core cellular processes in response to phage infection and environmental signals in Pseudomonas aeruginosa. We show that SrpA is essential for efficient genome replication of phage K5, and controls transcription by binding to a palindromic sequence upstream of the phage RNA polymerase gene. We identify potential SrpA-binding sites in 66 promoter re ...[more]

PMID: 29748556

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Dataset Information

Regulatory protein SrpA controls phage infection and core cellular processes in Pseudomonas aeruginosa.

Publications

Regulatory protein SrpA controls phage infection and core cellular processes in Pseudomonas aeruginosa.

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